Parallel association of rectennas for electromagnetic energy harvesting

Rectennas operating as microwave electromagnetic energy harvesting systems has a low input power and, as a result, a very low output power is delivered to the load. In this paper, is purposed a method to increase the output power by the use of a parallel association of rectennas. The antennas simulations were carried out using Computer Simulation Technology software. Rectifier circuits were designed using the Advanced Design System software. The project sought the impedance matching between rectifier circuits and antennas at the operating frequency. The measured results obtained with a single rectenna and associated rectennas are compared and discussed when operating with a 1000 Ω load.